Drug delivery pump



FIG. 1 is a top plan view of a drug delivery pump showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is rear elevational view thereof; and,

FIG. 7 is a top perspective view thereof.

The broken lines in the drawings depict portions of the drug delivery pump that form no part of the claimed design. 

CLAIM The ornamental design for a drug delivery pump, as shown and described. 